Water-tube boiler.



PATENTBD AUG. 14, 1906.

2 SHEETS-SHEET 1.

ATTORNEY THE mmms PETERS ca. WASHINGTON, nc,

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H. DEL MAR.

TERS go WASHINGTON. n. 04

WATER TUBE BOILER. APPLICATION FILED APR.-2B, 190s.

WITNESSES HARRY DEL MAR, OF NEWV YORK, N. Y.

WATER-TUBE BOILER.

Specification of Letters Patent.

Patented. Aug. 14, 1906.

Application filed April 28. 1906. Serial No. 314,283.

To all whom, it may concern:

Be it known that I, HARRY DEL MAR, of the city, county, and State of NewYork, have invented a new and Improved Water- Tube Steam-Boiler, ofwhich the following is a full, clear, and eXact description.

My invention relates to improvements in sectional water-tubesteam-boilers; and the object of my invention is to produce a watertubesectional steam-boiler for low and high pressure service and to arrangethe tubes so that the area thereof shall be equal in all parts of theboiler; also, to make the boiler compact, of large heating and gratesurface, and to have an arrangement of the tubes so that they will be inseries diagonally opposed and so that the heat and hot gases will bedeflected to the rear or side of the boiler after passing up between aportion of the tubes and then enter a flue or combustion-chamber, whencethey will pass over the upper half of the tube series and enter the flueor smokestack. The idea in this arrangement is to reduce the temperatureof the flue-gases and get a greater amount of heat on the tubes.However, this boiler need not be converted into a return-flue boiler,but can be so arranged that the gases are baffled before reaching thetopof the tube series and give good results. I prefer, however, to use thereturnflue system, as shown.

To these ends my invention consists of certain features ofconstructionand combinations of parts, which will be hereinafter described andclaimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters and figures of referenceindicate corresponding parts in all the views.

Figure 1 is a crosssection of the boiler embodying my invention. Fig. 2is a detail showing the connection with the water-leg. Fig. 3 is asection on the line 3 3 of Fig. 1. Fig. 4 is an end elevation with partsomitted, showing a modified arrangement of the tubes and drums. Figs. 5and 6 are sectional elevations showing modified forms of headers, andFig. 7 is a broken detail cross-section showing particularly a modifiedarrangement of the baffle or deflecting-arch.

My invention comprises a series of headers 10 and 11, arranged one belowthe other and on opposite sides of the boilers, and the headers may begiven different pitch or shapes to adapt them to various styles ofboiler-as,

for instance, they may be single headers, as shown in Figs. 1 and 2, orthe top headers may be single and the lower ones double, as shownin'Fig. 5, where the lower header 10 is double, or, as in Fig. 6, theupper headers 11 may be double and the lower ones single, or even otherforms of headers may be used without affecting the invention. The lowerheaders connect by nipples 12 (see Fig. 3) with the mud-drums 13 at theboiler-sides, and these are connected by equalizing-tubes 14. Eachmud-drum also connects with the header on the opposite side of theboiler by a series of tubes 15, and the drums 13 also connect by thelarge tubes 16 with the waterdrum 17, which is located, preferably, nearthe center of the boiler and beneath the steam-drum A. The upperportions of the lower headers 10 also connect by'diagonallyarrangedtubes 18 with the opposite upper headers 1 1, and the upper headers 11are also connected with the water-drum 17 by the tubes 19. The upperportions of the headers 11 also connect with the steam-drum A by thecross-tubes 20, and the steam-drum connects by the downtake-tubes 21with the vertical water-legs 22, which are arranged at theboiler-corners and connect with the drums 13 by nipples 23. The lowerheaders 10 are also connected by cross-tubes 14, which serve asequalizing-tubes and also support the baffle plate or wall 24, which canbe made of brick and which deflects the hot gases to the back flue 25 atthe end of the boiler, and thence the gases return, passing over theupper tubes of the boiler and into the smoke-stack 26. (See Fig. 3.)

A preferred form of baflie is shown in Fig. 7 in which the baffle-plate2 F is made in the form of an arch on opposite sides of the water-drum17, and this forms a sort of channel or flue which leads the gases backto the boX 25. It will be noticed by reference to the drawings that Iprovide tubes of equal area in all parts of the boiler, so that thereshall be an equal flow of steam and water, and it will also be seen thatinstead of using a single water-drum 17 I can use two or more, ifpreferred. The course of the water is as follows: From the steam-drum Athrough the downtake-tubes 21 and water-legs 22, through the nipples 23to the mud-drums 13, thence up through the tubes 15 to the headers 10,and through the tubes 18 from the headers 10 to the headers 1 1. A partof the water will also pass up through the tube 16, water-drum 17,

and tubes 19 to the headers 11, and from these headers it passes throughthe tubes 20 to the steam-drum. I

Instead of using two mud-drums, one muddrum 13 can be used, as in Fig.4, and in this case I use a small drum 13 on the opposite side of theboiler, which simply serves as a settling-drum, and this connects withthe mud-drum by tubes 27. In this construction I can also dispense withthe water-drum 17. In this type of boiler the headers will naturally beshaped a little difierently from those described; but I do not hereclaim any particular shape of header. As shown, the lower headers 1O onone side of the boiler connect with the mud-drum 13 through the seriesof tubes 15, while the lower headers on the opposite side of the boilerconnect with the mud-drums by means of the short tubes 28. This boileris practically the same in operation as that already described, and itcan have the same arrangement of water-legs and downtaketubes at thecorners.

From the foregoing description it will be seen that I thus provide aboiler having an equal flow of steam and water in all its parts,

that the tubes are arrangedto be easily heated, that I have a largegrate-surface, and that the arrangement is such as to utilize the heatfrom the products of combustion to a very great extent.

I wish to call attention to the fact that in my improved construction Imake practically a double boilerthat is, I have ,a double series ofcross-tubes divided by a bafiie, and in this way I utilize heat toadvantage. I wish, further, to call attention to the fact that thebaffle can be perforated, if desired, so that a part of the hot gasescan go up through it.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. A boiler of the kind described having asteam-drum water-drums and mud-drums connected together by headersacting as in termediaries, and series of upper an lower cross-tubesdiagonally opposed, the upper headers connecting to the steam-drum andthe lower headers connecting with the water drum mud-drums and upperheaders.

2. A boiler of the kind described having a steam-drum and mud-drum,opposed headers on opposite sides of the boiler, and opposeddiagonally-arranged cross-tubes connecting the mud-drum with the headersand connecting the headers with each other and with the steam-drum.

3. A boiler of the kind described having a steam-drum, an upper andlower series of cross-tubes diagonally opposed, a water drum, amud-drum, and opposed headers each header connecting with the water-drumand the upper series of headers connecting to the steam-drum while thelower series connect to a mud-drum.

4. A boiler comprising a steam-drum, a

.water-drum and n1uddrums, a series of opposed upper and lower headers,and a series of diagonally-opposed tubes arranged to connect the upperheaders with the steam-drum and water-drum and to connect the lowerheaders with the mud-drums and waterdrum.

5. A boiler having upper and lower series of cross-tubes, the two seriesbeing spaced apart, a combustion-chamber at the end of the boiler, and adeflector arranged between the upper and lower series of tubes andextending the'width and length of the boiler, whereby the draft iscarried from the lower tubes through the combustion-chamber and back tothe upper tubes.

6. A boiler having upper and lower series of diagonally-opposedcross-tubes, a middle or water drum, and a deflector arrangedtransversely and longitudinally of the boiler at a point adjacent to thewater-drum there- I by forming a baflie and return-flue.

7. In a boilerof the kind described, the combination ofdiagonally-opposed upper and lower headers connected by cross-tubes, oneheader of each series receiving plural rows of tubes, and the opposedheader a single row of tubes.

8. A boiler comprising a steam-drum, mud-drums and opposed upper andlower headers, a water-drum, cross-tubes connecting the lower headersand mud-drums, water-tubes connecting the water-drum and mud-drums,cross-tubes connecting the water-drum and upper headers, cross-tubesconnecting the lower headers and upper headers, and tubes connecting theupper headers and steam-drum.

HARRY DEL MAR.

Witnesses:

W. B. HUToHINsoN, FRANK L. STUBBs.

